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Normal values for fundus perimetry with the microperimeter MP1.

Edoardo Midena1, Stela Vujosevic, Fabiano Cavarzeran

  • 1Department of Ophthalmology, University of Padova, Padova, Italy. edoardo.midena@unipd.it

Ophthalmology
|May 18, 2010
PubMed
Summary

This study establishes normal light sensitivity values for microperimetry (MP1) across age groups, finding sensitivity decreases with age. The MP1 microperimeter demonstrates reliable short-term repeatability for retinal threshold testing.

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Area of Science:

  • Ophthalmology
  • Visual Neuroscience

Background:

  • Microperimetry is crucial for assessing retinal function.
  • Establishing normative data for microperimetry is essential for clinical diagnosis.
  • The MP1 microperimeter offers a tool for detailed retinal sensitivity assessment.

Purpose of the Study:

  • To determine age-stratified normal light sensitivity values using microperimetry (fundus perimetry).
  • To assess the short-term repeatability of the MP1 microperimeter in healthy individuals.

Main Methods:

  • A prospective, observational study involving 190 healthy volunteers (aged 20-75 years).
  • Automatic, full-threshold microperimetry of the central 20x20 degree field using the MP1 device.
  • Repeatability assessed in a subgroup (10 subjects) over 1 week and regression analyses used for age and regional variations.

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Main Results:

  • Mean macular sensitivity decreased significantly with age, from 19.6 dB (20-29 years) to 18.6 dB (70-75 years).
  • The superior retinal sector showed lower mean sensitivity compared to other regions (P<0.01).
  • The MP1 microperimeter demonstrated high short-term repeatability across all tested retinal areas (P<0.01).

Conclusions:

  • The MP1 microperimeter provides accurate and repeatable topographic retinal threshold examination.
  • This study presents the first extensive database of age-related, normal MP1 microperimetry results.
  • These normative values aid clinicians in interpreting microperimetry findings.